Air conditioner



FIG. 1 is a top, front and right side perspective view of an air conditioner according to my design;

FIG. 2 is a top plan view thereof, the bottom plan view of my design being the mirror-image of this top plan view;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for an air conditioner, as shown and described. 